Device for severing metals.



E. wIjss. DEVICE FOR SEVER-ING METALS. I APPLICATION PH-ED JAN. 5, 1907.

932,739. Patented Aug. 31. 1909 bxyye n 2 357a: 5 oxyyero Jnven for AnsPAEENT omen ERNST W183, QB GBm$HEIM-N-THE-HAIN,- GERMAN Y, ASSIGNOR TOOHEHISCHE EABRIK Gnmsnnm Emerson, GERMANY.

l0 mrxtnrritshfhiri"oafygen andpnre oxygen- 1 in theferm of ankle jet ata suitable pressure, toatiiefpfart wherethe cutting is to beefi'ected,"th e metal being oxidized and "the oxidfdispersed. In thedevices of this kind hitherto known for-carrying out this operationf-aheating flaineiand a jet of oxygen at high pressure havebeen suppliedto, the part to be severed,

This-flame andthis jet have not been eoinci-. dent-in their action asregards either space,

oriti'me, for the flame of combustible-gas and oxygen was firstsuipplied to the re quired lace, and a jcto oxygen was supplied a tershiitingathe said .jet of gas and oxygen. This separation of thetwooperations as regards time and-is ace is based on the erroneousimpressiontliat the heating flame plays a part,-during the severingoperationfwliich it does not play,;for thetime of heating, es .eciallyin the cascofthick' pieces of meta is not sniiicient, to pre-heat thepiece of metal, to the temperature of combustion despite thecomparatively high speed of severance. In the process, the

combustion, which progresses at a uniform,

rate, efiects first the required preheating of the metal at the cuttingplace, the heating flame startin the severance a: e. sufficientlypie-heating tie starting" point While, when the lace of severance hasbeen cooled by the jet'of oxygen the operation hast o be started again.In such a device it is therefore quite possible to cool the placeofiseverance by the blast of oxygen, v 1

llie present invention has for its ob ect to'obviate this disadvantageby causing. the supply of the heating'flame and the oxygen jet tocoincide both as regards time and place. The heatingfiame'need notgkeepthe full thickness of the metal to the ten' peravtureoi? combustiom'butonly thesharply undercut front edge or theplace ofi stverance and the.coelingot' the place of, seven l thiceification 03 Letters Patent. aucauonmaaanu 5, 1907; Serial No. 350,990.

3; this way 0F FRANKFORT-ON-THE-MAIN, GERMANY, A- CORPQRATION 0F ance bythe jet of oxygcn'and the interruption of the cut are thus avoided.

In order to sufficiently heat, by'mcans of a single apparatus, anythickness of metal, it IS necessary to vary thequantity of heating gasmixture and to adapt the width of the nozzle to the quantity of gasmixture then used.

This invention provides a device by means of which this object isattained in'a simple manner by making the oxygen nozzle capable ofmovement to effect the adjustment, according to requirements, of theannular opening through Which the gases for the heating flame issue.

1n the accompanying drawing, Figure-1 is a verticalsection of the devicein accordance with thisinvention, and Fig. 2 a horizontal section on theline ab of Fig. 2.

Patented Aug. 31, 1909.

' In external appearance the device rc sembles a Daniel burner, butdiffers therefrom inthat the inner supply tube isslidably arranged: inrelation to the outer tube a and that both the inner surface at the endof the outersupply tube and the outer surface of the inner tube areconical, but have not the" same ta er, the outer tube consistingessentially o a two-part casing, the: body portion 2 and the detachablenozzle 6,wliich is socketed and screw-threaded to receive a'screw-threaded projection of the casing. The inner tube3 projectsthrough a stufling box at one end of the casing and terminates inadetachable nozzle 4., and the outer casing or tube is contractedinternally at the open end and the inner tube is also tapered at theouter end so that there is an intervening annular space, the'inner tubebeing maintained concentric with the'outer tube by means of externalwings or lugs 5. Through a tube 1. a mixture of combustible gas andoxygen is supplied to the outer burner tube 2 whileanother tube 3supplies oxygen at a regulated pressure.

Before using the device, the tubel is use ed inside the tube 2, andnozzle 6 to such an extent that the nozzle 4, projects beyond theouter'nozzle 6, thereby insuring that the 31:

of oxygen issuesas near as 'ossible to metal to be 0 rated on .whi e theannular opening for t e: supply of combustible-gas and oxygen is more,or less, throttled. In the eifiux velocity of the' mixture of gases forthe flame is so regulated that it is greater than the then prevaillngspeed of ignition and back firing is prevented.

*Bymeans of the arrangement in accordance with this'invention' it ispossible to cut.

metal of any thickness, the width of cut being about two millimetersWhile no inten ruptlon of the work null-take place.

"i It will be noted that the tube to which the oxygen is supplied is theinternal tube and that it projects beyond the external tube or easing.This is a matter of great importance, maintaining the oxygen jet in itsorig inal shape at as'greatr a distance as possible from the nozzlethrough which the burning mixture esezipcs 'as this results in a cleancutting or severing of'the metal which cannot be attained if the oxygenis brought into intimate contact with the burning mixture before thelatter issues from the outer tube or easing. In other-Words I have foundthat by mamtannng a et of oxygen beyond the Having now particularlydescribed and ascertained the nature of my said invention andinWliatinanner the same is to be per-' formed I declare that What I claim1s 1; ,The combination in av burner for severjecting at said end beyondthe contracted end of the'casing, and means for supplying said tube withoxygei'l, for the purpose set forth.

9. The combination in a burner for severing -1netals, of a tube orcasing open and internally tapereo at one end and means for supplying amixture of combustible gas and oxygen thereto, and a tube Within saidcasing externally tapered at one end and proj'ectingat said end beyondthe contracted end of the casing, and means for supplying said tube withoxygen, said tube and casing relatively adjustable to vary thedimensions of the discharge opening around the inner tube, for thepurpose set forth.

3. The combination in a burner for severing metals of a casing providedwith a detachable nozzle. contracted internally at the open end andmeans for connecting said casing with a supply of combustible gas andoxygen, and a tube Within said casing pro vided with a detachable nozzletapering externally and projecting beyond the end of the casing andlongitudinally adjustable in respect to the casing and connnunicatingWith means for supplying oxygen thereto.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

nnus'r WISS.

Witnesses FRANZ l-lAssn-wi'ncn,

-ERWIN l )1 mug r..

